Multiple engraving machine



Aug. 19 1924.

F. B. @LOVER MULTIPLE ENGRAVING MACHINE Filed Oct. l, 1920 5 Sheets-Sheet 1 4 11" Y Z /00 l 5 /oa 95 44 4 0/ /59 fik-7M' owr Aug. i9 1924. 1,505,557

. F. B. GLOVER MULTIPLE ENGRAVING MACHINE 'Filed oct. 1, 1920 5 sheets-sheet 2 @mom/Lto@ fmz/ @Wer 33913,@ @Hom/Lew Aug. 19 1924. 1,505,557

F. B. GLovER MULTIPLE ENGRVING MACHINE Filed Oct, l, 1920 5v Sheets-Sheet 5 mosmtoz Aug. 19, i924. 41,505,557

F. B. GLOVER MULTIPLE ENGRAVING MACHINE Filed Oct. l, 1920 5 Sheets-Sheet 4 51m/vento@ @MJ ff@ www Aug. 19 1924.

F. s. @LOVER MULTIPLE ENGRAVING MACHINE Filed Oct. 1, 1920 5 Sheets-Sheet 5 WMZMW Patented ug. 19, i924.

Lsosssir MULTIPLE Aeiner'tAvrNc-i' mancini-m2' c Application filedy 'odore-f 1, 192e'. 'sriarnm 4141107,

.To all lazi/0m tf/1mg conce/1%.

Be 1t known that l. FRANK Bl Gnovnng av citizen ofthe United States; residing in engraved'in uniform manner,

Another object is to provide means for independently adjusting the articles to bring u. definite point-f into known relation with the scriber prior to engraving.

A further object is to provide means for raising" and lowering `the soribers as they are movedfroni one characte'rto another.'y

These and other objects, tending to ac- -uracy eiiciency andisimplicity7 asy will become manifest as the description proceeds, are attained by the novel construction, coinbination and arrangement ofL parts, hereinafter described. and shown in theL annexed drawings, forming a material andy essential part of this disclosure, and in ywhich-I4 Figure l is a front elevational view of an engravingl machine made in aocordancewith the invention.

Figure 2 is a top plan view of the same;y

Figure 3 is a rear elevational'view thereof.

Figure i is a partialside elevationalfand sectional View,` the section being taken on line l--w-elof Fig. l.

Figure 5 is an enlarged fragmentary view showing a scriber in operative position:

Figure 6 is a fragmentary view showing a section of the work frame slide and its'operatiug means. f

Figure 7 is a fragmentary perspective view of a template.

Figure 8 is a perspective viewy showing the scriber bar holder frame and its mountings. v y

Figure 9 is a side elevational view of the frame actuating device.

Figure l0 is a front side view of va thermometer, drawn to an enlarged scale andi showing the work for which the machine is specifically designed.

Figure 1l is a perspective view offone `of the pairs of work holding clamps showing its mounting.

Figure 12 is a perspective view yof a key device forl actuating allf'of the' worllh'olders on' oneside of' the' frame sintmltaneously.A

The' machine illustrated is" particularly designed for operating on` glass tubes, as* used for"` thermo1neters upon wli-iclrare' in scribed" numerals and other characters' with reference' to theirscales,' andi similar' inL script-ions, involving accuracy;7 duplication and rapidity` 'lhese'tubes are coated previouslywithfa suitable composition 'adapted to resist? the erosive effects of a bath in thei acids used to etch the charactersdirectly 'into the glass, through the'inar'li's inade in? the coating' by the stylii7 which are guided by a template inithe manner ofiy a pantograph Referringr to the drawingsin' detaih the' machine willibe seen to include levelbase plate "or platformL supported at a conven ient height byl any suitable/means', as for in'- stance/.the'pedestal orcolumn-26-f i N Secured on the upper surface of the platform, parallelv to and adjacent its front edges. are .a pair of spaced parallel rails 27 receiving between them atemplate or plate 28 yacting as a guide and Vhavingengraved characters of differentl sizes-arranged in grouped relation as indicated by the reference vcharac-ters 29 andiQQ and other indicia BO. as sho'wn'best in"Figures 2 and.

An undercut groove or slot` 32`is formed in the `platform parallel toits front edge and rearward of the rails, the same having fitted to it a slide 33, thepurposeof' whiclifwill be further on explained. f

Theslide 33. hassecuredto its under side araclz 34 engaging theteeth of agear 35 fixed( on a `spindle 36 mounted transversely in lugsv below the platformv andprovided with an operating knob v3S readilyaccessiblev to'an operator atthe .front of the machine;

Fixed upon the platform, near the rear', are a pair of posts 40, connected' attheir upper ends by bolts with a rigid archedtie beam Ll-l. having'at its'central,` highest portion lateral hubs bored to slidably: receivefa level cylindrical bar i2 provided witha slot 43 receptivefof the point of a knurled headed clamp screw 44 operable from the topiof the beam. f

Formed integral withthe front'end'of the "ar, LlQ/[arefa pair of spaced, downwardly extending 'lugs 45 and 45', ycarrying.conical pointed rset'screws 46 and 46 provided with check nuts for holding them when-in! ad;

justment, and pivotally mounted on the points of the screws is a spindle 47 from which extend the elements of a clevis yoke 48, provided at its opposed ends with pivot pointed set screws 49 and lock nuts as shown.

Engaged by the points of these screws is the upper end of a stiff vertical pendulous bar 50 comprised of a pair of side rails integrally lconnected by cross meinbers.

Carried at the lower end of the bar 50 are pivot screws 51 provided with lock nuts and engaging the rear end of a normally central, forwardly extending arm 52, in the frontV end of which is removablyv carried a stylus or pointer 53 adapted to engage in the characters of the template 28 as best shown in Figs. 2 and 4.

A slide 55 is fitted to operate on the rails of the bar 50, the same being clamped, when in adjustment, by a plate 56, through which passes a bolt 57, fixed in the slide and provided with a winged nut 58 and washer 59.

A pair of opposed, rearwardly extending lugs 60 are formed with the slide, receptive of the pivot points of set screws 61 passing through the ends of a clevis yoke 62 and provided with lock nuts as shown.

A hub 63 is formed with the connecting element between the clevis ends and from it extends an integral sleeve 64, bored to rotatably'receive a spindle 65 having a shoulder near its frontend held in contact with the endof the sleeve by adjustable lock nuts 66.

Beyond the shoulder is a head 68 bored and internally threaded at a right angleto the axis of thespindle, receptive of plugs 69 and 70, respectively upper and lower, having concave seats adapted to receive the spherical head 71 of a rod 72 passing freely down through an appropriate opening in the plug 70. The plugs 69 and, 70 both have enlarged {fange-like heads drawn tightly against the respective ends of the element 68 by reason 0f their screw threaded bodies and thus should the spherical head 71 become loosened by wear it'is an easy matter to adjust the saine in its bearings.

This arrangement, in practice, has been found to producey highly satisfactory results unattainable by ordinary gimbal joint connections.

vA pair of opposed uprights 75 are bolted to the platform 25 and secured to-their inner faces, respectively near their tops and bottoms, are pairs of short horizontal rails 76 and 77, extending parallel to the face-s of the upright and. being grooved longitudinally to act as races or tracks for the balls 78, held in operative position by pins 79 or like spacing elements.

Other grooved rails 80 and 81 engage the balls upon their opposite sides and are connected in pairs by integral bars 82 and 83, the same being'grooved lengthwise in their outer surfaces and adapted to receive other balls 84, supporting and guiding grooved bars andr86, connected to form an open, rigid rectangular frame, by'pairs of inner and outer vertical bars respectively 87 and 88 and 87 and 88 having between them the bars 82 and 83, the structure being shown in detail 'in Fig. 8.

A rigid flat open frame 90 having pads 91 extending laterally from its ends, is fastened by them to the rear bars 87 and 88 of each pair and extending rearwardly from the central element of the frame are lugs 92 provided with set screws for clamping the rod 72 adjust-ably and rigidly therein.

From the foregoing it will be apparent that maneuvering the arm 52 in accordance with the template causes the frames to move on their frictionless supports, backward or forward and to either side in exact conformity, but to a lesser degree, according to the posit-ion of the clevis yoke 62 relative to the length of the pendulous bar 50, through the gimbals and slides mentioned,

but that the frames are not raised or low-.

ered.

The bars 87 -87 and 88-88 extend above the frame and are connected at their tops by plates 95 in which are set-screws 96 their points impinging on the bars 85, thus adjusting the tension or pressure on the balls 84.

The extending ends of the bar 85 have secured to them Z shaped brackets 98 carrying adjustable screws 99 used in supporting magnets 100 provided with armatures 101 carried on rods V102 guided in brackets 103 also attached to the frame bar rllie rods 102 are fixed in the tops of vertical bars 105 extending down behind the cross bar 86 to which is attached rearwardly extending strips 106 carrying upright slide plates v107 attached by screws 108 or the like passing through slots 109 formed in the stops, the ends of the rods ybeing guided in openings in the strips 106.

Fixed in the inner sides of the bars 105 are a plurality of pins 110 extending sulficiently to act as lateral guides for lever bars 111 pivoted between the rear pairs 87 and 88 of the vertical bars on pins 112, and extending, at their rear ends below and in close proximity to the pins 110.

The front ends of the lever bars 111 are drilled to receive stems 113 formed with heads 114 in which the scribers 115 are adjustably secured, Pins A116 fixed in the front ends of the scriber bars are used to secure weights 117 by rwhich modera-te pressure on the scriber points may be adjustably applied.

Another pair of standards 120 and 121 1 are bolted to the slide 33, the standard 120 carrying hinge elements 122 and 123, 'the latter having a stop 124. rihese elements receive corresponding hinge elements 126 and 127 lixed upon the side strip 125 et a swinging frame, this strip being connected by rigid bars 128 and 129 with the mating front strip 136 forming the four sides of the trame which may be secured, when in a closed position between the standards, by a pair of buttons l132 pivoted on pins .133 set in the standard 121 and operated in unison by a connection rod 134 pivoted to the outer ends of the ybuttons and provided with an actuating handle 185 by which the buttons are operated.

A plurality of rack bars 138 having downwardly extending teeth are attached at their ends respectively to the frame side strips and 130 and are also connected by a central vertical bar 139 ixed at its upper end to the top transverse element r128 of the frame, as best shown in Fig. 1. n

Slidably disposed over the tops and sides of the rack bars are casings 140, their side elements having lugs 141 receptive of "transverse spindles 142, actuated by extending knurled knobs 143 and carrying pinons 144y engaging the teeth of the rack so that the casings may be easily and definitely moved longitudinally of the racks.

Slidable on the casings are pairs of Work holders or clamps each consisting of a body 145 having a narrow; rearwardly extend ing jaw or lug 146 at the top and a full width projection 147 therebelow. At the front a pair of down turned lugs 148 carrying pivot pins 149 on which are mounted levers 150, passing below the rack bars and connecting' with the stems 151- of blocks 152.

These stems are guided in openings appropriately formed in the projections 14T so that the blocks, which constitute lower jaws, are in register with they iixed upper jaws 146 and are movable towards or from them by the levers 150.

The outer ends of these levers are drilled to receive the cylindrical ends of a square bar 156 on which is mounted a flat spring 157 raised at its center and held by' screws passing through slots 158 near its.

ends, thus permitting the spring to yield under pressure as applied by the cam 160. The cam is `fixed to the lower end of a vertical spindle 161 rotatable in brackets '162, fornied with or secured to the casing 2X0 and provided with an operating hand lever by which the cam is rotated.

From the foregoing it will be seen that the work holders, comprised of elements 140-168 may be moved along the racltbars 1: 8 into any ydesired position with reference to the scribers 115; that the blocks or heads 145 are independently adjustable on thecasing, towards or from each other, thus pro.- viding for work parts of varying lengths, and that the jaws y152 are simultaneously movedy to clamp work against the ixed jaws 146, which being level,r always present the upper surface ot thefworl; at a uniform plane, irrespective ot variations in its diameter. y f

lt rwill further be noticed that pressure is equally applied to each pair of' jaws and tlfough the intermediary of a spring so as to avoid crushing or other damage to the work parts, as exemplified by the therinometer tube 200, shown in vdetail in Fig. 10 and in broken lines in' Figs. 1 and 2.

As has been described, these several work holder support racks are iixed in tiers hori zontally in trames comprised of elements 125-180 and secured by hinges in such manner as to permit complete separation from the uprights 120-121, thus aiiiording'opportunity for one of the frames to be charged with the work parts while another frame is being operatedl in the machine. ln certain classes ofworlz, as 'for 'instance inscribing names, etc., where the inscription does not ret'er to yany exact `point on the work surface, the device shown in Fig. l2 maybe used.

This consists of a bar having lateral projections 171 containing aligned openings 172 adapted to' engager the work holder clamp'elements 168 so that all of the several work holdersupon one side ol" the trame can be simultaneously operated, it being l understood that in this case the several spindies 161 are in vertical alignment.. n

ritter the tubes or other work parts have been clamped in their holders their support frames are placed upon the hinge elements122-m128, swung into operative position, and clamped by operating the handle whereupon the work parts are adjusted by movingfthe work holderslongitudinally on the rack'bars so that certain definite points previously indicated upon the tube are brought into vertical registration with the scribers. j y

The desired character on the template 28 as the numeral 8, (see Fig. 2) having been brought into an approximately central position relative' to the machine, though not absolutely necessary, the bar 52 carrying stylus 58Vis'grasped by an operator at a point :near the h ad carrying t-he stylus so as to conveniently and easily` guide and manipulate the same and is then 'placed in the lines of template.

Due to the gimbal joints and freely swinging connections used, ther movement et the stylus is accurately conveyed, but in a reduced degree, to the :trame 90A and thence to the scriber bar carrying frame, which is mounted to move without friction, in a level plane, scribers to faithfully follow the movement impartedkto the stylus. i v

The amount of reduction of movement is in any direction, thus 'causing the ustably controlled by the position of the slide upon the pendulous lever bar 50, relative to the distance from its pivotal support point and proportional to its length, the rod 72 being correspondingly adjustable in the` lugs protruding from the frame 90.

ll ef the several stylii and their supporting frames are adjustable to er from the centers of the Work jaws by movement of the cylindrical bar 42 within its arched support, Athus simultaneously) changing their plane as may be desired to acroniinodate different shapes of Work.

source of electrical energy, as a stcrage battery 170 provided to energize the magnets lOO, a push button switch 172 being iccated on the platiirm stylus har, or cn the floor, Where it can be conveniently reached by an operator to control the circuit. y

The scriberbars lll are so pivote/d to cause their liront ends, which carry the scribers, when approximately level, to operatively engage the surfaces of the Werl; parts, the position of the armatures 103 being against the ends of the magnets when engraving, but when it is desired tc shift the scribers from one character' to another, the button switch is released, causing a break in the current and consequently freeing the armatures which. dropping down lby gravity, carry the bars 105, their pins ll() striking and tilting the scribers simultaneously up from the work.

Although electro-magnet means have been described and shown as used for raising and lowering the stylii, it will be apparent that a Wide range of mechanical devices may be substituted which will operate effectively and quickly in producing the same results and which are not precluded from use.

It is also to be understood that any of the commercial forms of pantographs may be substituted for the elements 25 to 55 as herein described Without conflicting with the principal characteristics of the invention andwhich would not be beyond the ability of a mechanic to change so as to be used in connection with the remaining and more consequential elements.

From the foregoing it will be seen that the operation of the machine is efficient and rapid as Well as accurate, and also that a plurality of similar Work pieces can be operated upon at the same time Without difficulty,

lt is not desired, however, to be confined strictly to the specific mechanical parts asv described, as under the spirit and scope of the invention, mechanical equivalent-s may be substituted and variations made Without departing from the general intention of the invention.

l/Vhat I cla-im as nen7 and desire to secure by Letters Patent, is c l. An engraving machine comprising a frame having a plurality of scribers therein, means for actuating the scribers simultaneously, and means for collectively raising said scribers, said mea-ns permitting raising the scribers independently.

2. An engraving machine comprising a frame having a plurality of scribers therein, means for actuating the scribers simultaneousl 7 and means for differentiating the pressure of said scribers individually upon the .vorlr surfaces.

An engraving machine comprising a frame having a plurality of scribers operable uniformly in the same vertical plane therein, Work holders adjacent eaeh scriber, means for raising all of said scribers in unison, said scribers normally descending by gravity, and a single means for guiding said scribers. y

a. An engraving machine comprising fixed supports carrying a floating frame having a plurality of scribers movable therein, means for producing uniform simultaneous action thereof, a frame removably engaged to said xed supports, Work holders in removable frame, and means for adjusting each holder relative to its corresponding scriber. l

5. An engraving machine comprising fixed supports, a floating frame therein, carrying a plurality of scribers, means for producing uniform simultaneous action of said scribers, a frame hingedly engaged to said fixed supports, means for clamping said removable frame in operativek position, a series of duplex Work holders, and means for independently adjusting said holders longitudinally in the floating frame.

6. An engraving machine comprising fixed nupports carrying a floating frame having a plurality of scribers movable therein, means for actuating the scribers simultaneously, an interchangeableivorlr holding frame hingedly engaged in said supports, and a single means for clamping said frame at points opposite the hinges.

7'. An engraving machine comprising a floating frame having a plurality of scribers movable therein, a single means for actuating all of said scribers uniformly, and a guide template for said actuating means, said scribers being so mounted as to permit shifting-collectively transversely to said guide template. l

8. An engraving machine comprising fixed supports having a movable frame having a plurality of scribers movablein said frame, a single means for actuating all of said scribers uniformly, a guide template for said actuating means, a slidevvay longitudinally disposed on said frame in which said guide template can be adjusted, and means for collectively adjusting said scribers relative to said guide template laterally.

9. An engraving machine comprising a movable frame having a plurality4 of scribers acting in unison, a single guide template therefor, Work carrying frame,removably engageable with said tia-ed frame, rack bars arranged in tiers horizontally inthe Work carrying frame, Work yholders slidable on said bars, and means for adjusting the ivork holders with respect to said scribers.

l0. An engraving machine comprising iixed supports, a frame :lioatingly mounted therein having a plurality of scribers operably in unison, a single template therefor, av

universally movable support in saidiframe upon which said scribers are pivoted, said support being movable in a ylevel plane in any direction, stops for said scribers and means for raising said scribers upon'their pivots.

ll. An engraving machine comprising a fioatingly mounted frame having a plurality of scribers operable in unison, a single guide template therefor, a Work frame engagea-ble with the supports of said iioating frame, a plurality of Work holders carried by said Work frame, means for independently adliusting said Work holders in the Work frame, and means for moving said Work frame and holders lengthwise.

l2. An engraving machine comprising a platform, an. arched support at the rear of said platform, a horizontal yoke bar adjustable in said support, a universal giinbal mounted in the yoke bar, a pendulous lever suspended by said gimbal, a stylus carrying arm pivoted at the bottom of said lever, means for guiding the stylus, and a plurality of scribers operated by said lever in conformity with the movement of the stylus.

13. An' engraving machine comprising a support, a lever mounted at its upper end in said support to move in any direction, a manually operable arm hingedly engaging the lowerend of the lever, a stylus adjustably carried by said arm,- a movable guide for said stylus, a slide adjustable on said lever, a floating frame operated by said slide supports for said frame and a plurality of scribers carried in said floating frame.

lll. An engraving machine comprising a platform, a slide movable lengthwise of the platform, standards fixed on said slide, a frame hinged to one of said standards, a sin-k gle means for clamping said framer to the other standard, and a plurality of Work holders mounted in vertical rows independently movable lengthwise in said frame.`

l5. An engraving machine comprising a platform7 a vertical lever suspended by gimbals over said platform, an arm pivoted in a horizontal plate to said lever, a stylus carried at the end of said arm, a guide for said stylus adjustable at the front of the platform, a plurality of scribers operated by said lever, and means for adjusting the movement of said scribers relative to the stylus.

n #16. An engraving machine comprising a platform, fa slide, apair of uprights fixed thereon, a frame universally iiiovalcleA in horizontal directions, said frame having horizontal elements extending at each of its corners to the front and rear, corresponding elements tired on said nprights, -allof said elements kbeing groved to .receive anti-friction balls, means for adjusting the pressure on the balls, andlmeans for imparting motion rto said frame. v

17. Air engiavingr machine `co-iriprising a platform having slide,r uprights on said slide, standards fixed `,on said 'platfornn a plurality of work holders removably engaged in the standards,fa frame tloatingly held by said uprights, stylus carrying `bars pivotally supported and kguided in said frame,y `l,ie stylii carriedl therebycorresponding to said Work holders,r` means for tilting the bars on their pivots, and means for manually actuating the frame in accordance With a temperature whereby the stylii are caused to travel predetermined paths,

in engraving machine comprising a plurality `of scriber carrying bars arranged in vertical rows, means for pivotally supporting and guiding said bars, means for tilting the bars upon their pivots whereby the scribers are raised or lowered, a frame antifrictionally mounted in which said bars are mounted, and means for moving said frame whereby the scribers are caused to travel a given path simultaneously.

19. An engraving machine comprising a platform, ak support thereon, a universally mounted pendulous lever adjustably carried in said support, Ameans for controlling the movement of said lever, a slide engaging said lever, a clevis yoke connecting vwith said slide, a tubular extension formed With the yoke, a bar rotatable in said extension, said bar having a head, a frame mounted to move universally in a level plane on the platform, scriber bars pivoted in said.I frame, a rod adjustably secured in said frame, said rod having a spherical end, and means for holding said spherical end in the head of said bar.

20. An engraving machine comprising a plurality of scriber carrying bars arranged in paired relation in vertical rows, a frame i having pairs of vertical barsbetiveen which said scriber bars are guided, pivotal supports carriedk by certain of said vertical bars in each pair for said scriber bars, ,other vertical bars carrying lateral pins adapted to make contact with the rear ends of said scriber bars, means for holding the last named bars in a raised. position whereby the scribers are permit-ted to make operative contact with the Work, means for raising the scribers simultaneously, and means for actuating said frameJ in any direction horizontally.

21. A work holder comprising a frame having a support, means for moving said frame longitudinally thereon, duplex heads slidable on said frame, iXed and movable jaws in said heads, and means carried by said frame for actuating the movable jaws of each head simultaneously.

22. A plurality of work holders each having a pair of fixed and movable jaws, a single operating means for each pair of the movable jaws, and means for simultanekoiisl actuatinfT said o eratinof means.

23. A work holder comprising a slidably mounted frame, heads independently slidable on said frame, fixed and movable jaws carried by said heads7 levers for operating said movable jaws, a bar engaging both levers, a cam adapted to exert pressure-on said bar, lmeans for actuating said cam, and

a spring interposed between said cam Aand bar.

24. A. work holder comprising a frame, a rack bar on which the frame is mounted, means including a pinion for moving said :trame on the bar, duplex head slidably mounted on said fram, jaws having level low/ei.` surfaces extending rigidly from said heads, grooved jaws movable vertically in said heads relative tothe liXed jaws, actuating levers for movable jaws, a single bar engaging each pair of levers, and means for exerting pressure on said bar whereby said movable jaws are moved simultaneously towards the iXed jaws.

In testimony whereof I have signed my name to this application.

FRANK B. eLovER.. 

